[Question] Batch processing?

[overwraith]

I am trying to take some batch script and make it executable line by line in the command prompt. Have made some good progress, but some of the aspects of batch programming still evade me.

at this webpage: http://forums.techgu...-selecting.html

I found this code:

BATCH FILE CODE
setlocal EnableDelayedExpansion
set count=0
for /f "delims=" %%a in ('dir /b *.mp4') do @(
	set filename[!count!]=%%a
	set /a count = count + 1
)
set /a choose = (%random% * 32768 + %random%) %% count
set chosen=!filename[%choose%]!
echo %chosen%
pause[/CODE]

which I figured out I could put the set commands on one line using the '&' operator, and I could change the file scope to all files in the directory:

[CODE]BATCH FILE CODE
setlocal EnableDelayedExpansion
set count=0
for /f "delims=" %%a in ('dir /b *.*') do @( set filename[!count!]=%%a & set /a count = count + 1 )
set /a choose = (%random% * 32768 + %random%) %% count
set chosen=!filename[%choose%]!
echo %chosen%
pause[/CODE]

Now what is bothering me is converting the variables to command line batch instead of batch file batch. I know the counter variables we have to take off a '%' operator, but the '!' operators really confuse me. Do we have to completely change the '!' operators? This will ultimately be something my ducky types in to select a random file to append an alternate data stream to. It is very important that there is a variable at the end of whatever solution is made which contains the file name. When you paste this in your command prompt to test paste "cmd /V:On" at the beginning to enable delayed variable expansion. My understanding of delayed variable expansion is limited right now, I only know that if it is not enabled and a for loop calls the same variable twice there will be problems.

My current code with one '%' removed from the counter variables:

[CODE]ATTEMPT AT CONVERTING TO STRAIGHT COMMAND LINE
cmd /V:On
set count=0
for /f "delims=" %a in ('dir /b *.*') do @( set filename[!count!]=%a & set /a count = count + 1 )
set /a choose = (%random% * 32768 + %random%) % count
set chosen=!filename[%choose%]!
echo %chosen%
[/CODE]

Edited December 23, 2012 by overwraith

[overwraith]

I think it works. Sorry. That's a first.NV.

Was late at night when I first posted this.

Edited December 23, 2012 by overwraith